Just judging by some of the early Norwegian black metal on this list, you need Nattens Madrigal by Ulver, Pure Holocaust by Immortal, and Nemesis Divina by Satyricon. You may have already heard them, but they're not here so I'm just throwing them out there.

@ Hawks I've heard a bit of that Ulver album but should probably check it out again, never really dug Immortal but I'll check that again to, and never thought Satyricon was for me but that first album looks intriguing.

@EverythinEvil2113 I actually have that Forest album and totally forgot about it, Imma go listen to it now.